ABB RET670 1MRK004816-AC | Relion670 Digital Transformer Protection IED Relay-Guangzhou Qiming Automation Technology Co., Ltd.

Core Protection Function List：

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Main Protection

87T Transformer Differential Protection(2W/3W configurable)
64REF Restricted Earth Fault Protection(High/Low Impedance optional)

Backup Electrical Protection

50/51 Phase Overcurrent,50N/51N Residual Earth Overcurrent
24 Overexcitation Protection,59 Overvoltage,27 Undervoltage,81 Frequency Protection
50BF Breaker Failure Protection,67 Directional Overcurrent

Non-Electric Protection(External access)

71T Buchholz(Gas),Winding Temperature(26),Pressure Relief,Oil Level Protection

Control & Auxiliary

Breaker auto-reclose, bay interlock, load shedding, remote switch control, fault event recorder

RET670 1MRK004816-AC

Detailed Technical Parameter Table：

Item	Specification
Part No	RET670 / 1MRK004816-AC
Rated AC Input	1A/5A CT current,100V PT voltage configurable
Power Supply	24~250VDC / 100~240VAC wide-range universal power
Sampling Rate	64 samples per power frequency cycle
Meas Accuracy	±0.5% Current,±0.2% Voltage high precision
Binary I/O	16 programmable DI,20 programmable DO relay output
Communication Port	Dual independent Ethernet;RS485;Fiber optional
Supported Protocol	IEC61850(GOOSE/MMS/SMV),Modbus TCP/RTU,DNP3,IEEE1588 PTP
Working Temp	-25℃~+55℃ Operation;-40~+70℃ Storage
Front Protection	IP54, cabinet flush panel install
Dimension	Standard 4U substation relay cabinet size
Power Consumption	＜25W normal running
Certification	IEC60255,IEC61850,CE industrial standard

RET670 1MRK004816-AC

Application Industry：

Thermal/Hydro Power Plant: Main transformer & Gen-transformer set protection replacement
HV Substation:110kV/220kV/330kV/500kV main & auxiliary transformer protection
Captive Power Station:Steel,Chemical,Mine self-owned power plant transformer retrofit
New Energy:Wind/Solar booster station main transformer protection
Digital Substation Upgrade:Old analog protection renovation with IEC61850 networking

FAQ：

Q1: What’s difference between RET670 and RET650?

A: RET670 dedicated for full-function transformer protection with dual differential optional;RET650 mainly feeder/line protection, limited transformer auxiliary function only.

Q2: Does it support IEC61850 digital substation?

A: Yes,native IEC61850 with GOOSE interlock & SV sampled value, direct connect process level MU merging unit.

Q3: Can replace old RET521/RET541 legacy protection?

A: Same cabinet mounting size, function mapping available, field logic reconfigurable for direct swap replacement.

Q4: Fault record storage capacity?

A: Built-in large buffer, store multiple fault wave recording, export via Ethernet/USB for post-fault analysis.

Q5: Available for auto-transformer?

A: Pre-set auto-transformer algorithm, support three-winding auto-transformer differential & REF protection directly。

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.